I have been trying everything I can to solve this, im sure its not that hard ,but I am just not seeing it. Well here goes:
A fly wheel of radius 0.4m, rotates with an angular displacement (theta) given by the expression:
(theta)= 4t^2 - 3t +2
Where theta is in radians and t is in seconds.
a) What is the tangential accleration of a point on the outside rim of the wheel?
I think At= ra
so At= (.4m)( 8 rad/s)= 3.2 rad/s?
What is the centripetal acceleration of a point on the outside rim of the wheel?I dont know how to go about this I know Ac= V^2/r. I am not sure how to get velocity out of this though I know velocity is the 2nd derivative ,but I dont get how I would plug that in?
c) What is the total acceleration of a point on the outside rim of the wheel?
Would this just be tangential accelration plus centripetal accelration?
Any help would be nice, im really trying I just do not understand this problem.